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1.
Evolutionary history of mole rats (genus Nannospalax) inferred from mitochondrial cytochrome b sequence
Boris Kryštufek, Elena Ivanitskaya, Atilla Arslan, Emine Arslan, Elena Bužan, 2012, original scientific article

Abstract: Mole rats (genus Nannospalax) display prolific chromosomal variation with more than 50 distinct cytotypes. These cytotypes are largely indistinguishable morphologically, are mainly allopatric and their taxonomic ranking is contradictory. We established a cytochrome b phylogeny for 15 cytotypes belonging to all three species recognized on morphological grounds (morphospecies): N. leucodon, N. xanthodon and N. ehrenbergi. Phylogenetic reconstructions yielded two highly divergent groups which are in agreement with the current division into two subgenera (Nannospalax and Mesospalax). The former comprised samples from south-eastern Turkey, Israel and Egypt (the morphospecies N. ehrenbergi). Basal dichotomy within Mesospalax remained unresolved and the putative sister position of N. leucodon against the two lineages of N. xanthodon was not supported in our analysis. Net divergences between sister cytotypes were low (< 2.0%) and two N. leucodon cytotypes were not even reciprocally monophyletic. Among the three morphospecies, the genetic diversity was lowest in N. leucodon (2.4% 0.3%), highest in N. xanthodon (8.8% 0.7%) and intermediate in N. ehrenbergi (5.0% 0.5%). Our results show that associations between genetic and chromosomal variation are not widespread and common in mole rats, and therefore refute the generalization of a 'cytotype-equals-species' approach
Found in: ključnih besedah
Summary of found: ...for 15 cytotypes belonging to all three species recognized on morphological grounds (morphospecies): N. leucodon,... ...ehrenbergi, Nannospalax leucodon, Nannospalax xanthodon, Spalax, species delimitation, ...
Keywords: molecular phylogeny, Nannospalax ehrenbergi, Nannospalax leucodon, Nannospalax xanthodon, Spalax, species delimitation
Published: 15.10.2013; Views: 1729; Downloads: 64
URL Full text (0,00 KB)

2.
New insights into the taxonomy and phylogeny of social voles inferred from mitochondrial cytochrome b sequences
Boris Kryštufek, Tanya Zorenko, Elena Bužan, 2012, original scientific article

Abstract: We sequenced the entire cytochrome b gene in Microtus paradoxus from Turkmenistan and Microtus socialis from Crimea and Kalmykia. Phylogenetic relationships among social voles were reconstructed by the inclusion into analyses of a further 23 published haplotypes belonging to six species. The two probabilistic methods which were used in phylogenetic analyses, the Bayesian inference and Maximum Likelihood, yielded very similar results. Both trees showed two highly divergent lineages which were further subdivided into seven species. The socialis lineage encompassed four species (M. socialis, M. irani, M. anatolicus, and M. paradoxus), and the remaining three species clustered into the guentheri lineage (M. guentheri, M. hartingi, M. dogramacii). The ranges for nucleotide divergences between seven species of social voles (4.95-9.28% and 4.18-8.81% for mean and net divergences, respectively) mainly exceeded 4.3%, which is frequently regarded as the conservative cut-off between sibling species in the specious genus Microtus
Found in: ključnih besedah
Summary of found: ...further 23 published haplotypes belonging to six species. The two probabilistic methods which were used... ...socialis, Microtus paradoxus, Arvicolinae, Cryptic species, Species delimitation, Molecular systematics, ...
Keywords: Microtus socialis, Microtus paradoxus, Arvicolinae, Cryptic species, Species delimitation, Molecular systematics
Published: 15.10.2013; Views: 1599; Downloads: 67
URL Full text (0,00 KB)

3.
Mitochondrial sequences point on a cryptic species in five-toed jerboas, subgenus Paralactaga
Boris Kryštufek, Atilla Arslan, Adwan Shehab, Mounir Abi Said, Sara Zupan, Martina Lužnik, 2013, original scientific article

Abstract: We addressed the species taxonomy of five-toed jerboas ( Allactaga , subgenus Paralactaga ) in the Middle East by applying molecular markers (cytochrome b and a partial 16S rRNA). The study consisted of 17 specimens from eight localities in the Middle East, representing both species: Allactaga euphratica and Allactaga williamsi . The phylogenetic reconstructions yielded three highly divergent lineages, which failed to conform to the recent taxonomy of Paralactaga . The first lineage ( williamsi lineage) encompassed all the samples of A. williamsi from Turkey and Iran and also the specimens of A. euphratica from Lebanon. The haplotypes of A. euphratica were arranged into two lineages, which showed strong geographic associations. One lineage contained samples from Harran in Turkey and from Iran, while all the samples from Syria clustered in another lineage. The pairwise Kimura twoparameter values suggested similar divergences between the three lineages and were within the range reported for a sister species of rodents. Our results point to a cryptic species in A. euphratica and also provide evidence of the expanded range of A. williamsi further south of Lebanon
Found in: ključnih besedah
Summary of found: ...Allactaga williamsi, five-toed jerboas, molecular phylogeny, species delimitation, aridland biodiversity, ...
Keywords: Allactaga euphratica, Allactaga williamsi, five-toed jerboas, molecular phylogeny, species delimitation, aridland biodiversity
Published: 15.10.2013; Views: 2689; Downloads: 77
URL Full text (0,00 KB)

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